Thank you for your input @cciesec2011, I am still in the planning phase and reading all the material related to ACS to ISE migration. I am planing to migrate the machines manually, will extract the data from ACS and create csv files with the fields r...

Please check the route from the PC you are accessing the ASDM. You might have to add the route. 

I will try to export and make CSV files to be imported into ISE. Thank you so much for your time and reply. -Wasif